Update changed folder name

CM2005 Object Oriented Programming/Topic 4/4.4.11/OrderBook.h

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+#pragma once
+
+#include "OrderBookEntry.h"
+#include "CSVReader.h"
+#include <string>
+#include <vector>
+
+class OrderBook
+{
+  public:
+    /* Construct, reading a csv data file */
+    OrderBook(std::string filename);
+    /* return vector of all known products in the dataset */
+    std::vector<std::string> getKnownProducts();
+    /* return vector of Orders according to the sent filters */
+    std::vector<OrderBookEntry> getOrders(OrderBookType type, std::string product, std::string timestamp);
+    /** returns earliest time in the order book */
+    std::string getEarliestTime();
+    /** returns the next time after the sent time in the orderbook
+      * If no next timestamp is found, wraps to the start */
+    std::string getNextTime(std::string timestamp);
+    static double getHighPrice(std::vector<OrderBookEntry>& orderList);
+    static double getLowPrice(std::vector<OrderBookEntry>& orderList);
+  private:
+    std::vector<OrderBookEntry> orders;
+};